1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Regulator driver for LP87565 PMIC
4 *
5 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
6 */
7
8#include <linux/module.h>
9#include <linux/platform_device.h>
10#include <linux/regmap.h>
11
12#include <linux/mfd/lp87565.h>
13
14#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm,		\
15			  _er, _em, _ev, _delay, _lr, _cr)		\
16	[_id] = {							\
17		.desc = {						\
18			.name			= _name,		\
19			.supply_name		= _of "-in",		\
20			.id			= _id,			\
21			.of_match		= of_match_ptr(_of),	\
22			.regulators_node	= of_match_ptr("regulators"),\
23			.ops			= &_ops,		\
24			.n_voltages		= _n,			\
25			.type			= REGULATOR_VOLTAGE,	\
26			.owner			= THIS_MODULE,		\
27			.vsel_reg		= _vr,			\
28			.vsel_mask		= _vm,			\
29			.enable_reg		= _er,			\
30			.enable_mask		= _em,			\
31			.enable_val		= _ev,			\
32			.ramp_delay		= _delay,		\
33			.linear_ranges		= _lr,			\
34			.n_linear_ranges	= ARRAY_SIZE(_lr),	\
35			.curr_table = lp87565_buck_uA,			\
36			.n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\
37			.csel_reg = (_cr),				\
38			.csel_mask = LP87565_BUCK_CTRL_2_ILIM,		\
39		},							\
40		.ctrl2_reg = _cr,					\
41	}
42
43struct lp87565_regulator {
44	struct regulator_desc desc;
45	unsigned int ctrl2_reg;
46};
47
48static const struct lp87565_regulator regulators[];
49
50static const struct linear_range buck0_1_2_3_ranges[] = {
51	REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000),
52	REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000),
53	REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000),
54};
55
56static const unsigned int lp87565_buck_ramp_delay[] = {
57	30000, 15000, 10000, 7500, 3800, 1900, 940, 470
58};
59
60/* LP87565 BUCK current limit */
61static const unsigned int lp87565_buck_uA[] = {
62	1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000,
63};
64
65static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev,
66				       int ramp_delay)
67{
68	int id = rdev_get_id(rdev);
69	unsigned int reg;
70	int ret;
71
72	if (ramp_delay <= 470)
73		reg = 7;
74	else if (ramp_delay <= 940)
75		reg = 6;
76	else if (ramp_delay <= 1900)
77		reg = 5;
78	else if (ramp_delay <= 3800)
79		reg = 4;
80	else if (ramp_delay <= 7500)
81		reg = 3;
82	else if (ramp_delay <= 10000)
83		reg = 2;
84	else if (ramp_delay <= 15000)
85		reg = 1;
86	else
87		reg = 0;
88
89	ret = regmap_update_bits(rdev->regmap, regulators[id].ctrl2_reg,
90				 LP87565_BUCK_CTRL_2_SLEW_RATE,
91				 reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE));
92	if (ret) {
93		dev_err(&rdev->dev, "SLEW RATE write failed: %d\n", ret);
94		return ret;
95	}
96
97	rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg];
98
99	/* Conservatively give a 15% margin */
100	rdev->constraints->ramp_delay =
101				rdev->constraints->ramp_delay * 85 / 100;
102
103	return 0;
104}
105
106/* Operations permitted on BUCKs */
107static const struct regulator_ops lp87565_buck_ops = {
108	.is_enabled		= regulator_is_enabled_regmap,
109	.enable			= regulator_enable_regmap,
110	.disable		= regulator_disable_regmap,
111	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
112	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
113	.list_voltage		= regulator_list_voltage_linear_range,
114	.map_voltage		= regulator_map_voltage_linear_range,
115	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
116	.set_ramp_delay		= lp87565_buck_set_ramp_delay,
117	.set_current_limit	= regulator_set_current_limit_regmap,
118	.get_current_limit	= regulator_get_current_limit_regmap,
119};
120
121static const struct lp87565_regulator regulators[] = {
122	LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops,
123			  256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
124			  LP87565_REG_BUCK0_CTRL_1,
125			  LP87565_BUCK_CTRL_1_EN |
126			  LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
127			  LP87565_BUCK_CTRL_1_EN, 3230,
128			  buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
129	LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops,
130			  256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET,
131			  LP87565_REG_BUCK1_CTRL_1,
132			  LP87565_BUCK_CTRL_1_EN |
133			  LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
134			  LP87565_BUCK_CTRL_1_EN, 3230,
135			  buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2),
136	LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops,
137			  256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
138			  LP87565_REG_BUCK2_CTRL_1,
139			  LP87565_BUCK_CTRL_1_EN |
140			  LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
141			  LP87565_BUCK_CTRL_1_EN, 3230,
142			  buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
143	LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops,
144			  256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET,
145			  LP87565_REG_BUCK3_CTRL_1,
146			  LP87565_BUCK_CTRL_1_EN |
147			  LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
148			  LP87565_BUCK_CTRL_1_EN, 3230,
149			  buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2),
150	LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops,
151			  256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET,
152			  LP87565_REG_BUCK0_CTRL_1,
153			  LP87565_BUCK_CTRL_1_EN |
154			  LP87565_BUCK_CTRL_1_EN_PIN_CTRL |
155			  LP87565_BUCK_CTRL_1_FPWM_MP_0_2,
156			  LP87565_BUCK_CTRL_1_EN |
157			  LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
158			  buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
159	LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops,
160			  256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET,
161			  LP87565_REG_BUCK2_CTRL_1,
162			  LP87565_BUCK_CTRL_1_EN |
163			  LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
164			  LP87565_BUCK_CTRL_1_EN, 3230,
165			  buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
166	LP87565_REGULATOR("BUCK3210", LP87565_BUCK_3210, "buck3210",
167			  lp87565_buck_ops, 256, LP87565_REG_BUCK0_VOUT,
168			  LP87565_BUCK_VSET, LP87565_REG_BUCK0_CTRL_1,
169			  LP87565_BUCK_CTRL_1_EN |
170			  LP87565_BUCK_CTRL_1_EN_PIN_CTRL |
171			  LP87565_BUCK_CTRL_1_FPWM_MP_0_2,
172			  LP87565_BUCK_CTRL_1_EN |
173			  LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
174			  buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2),
175};
176
177static int lp87565_regulator_probe(struct platform_device *pdev)
178{
179	struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent);
180	struct regulator_config config = { };
181	struct regulator_dev *rdev;
182	int i, min_idx, max_idx;
183
184	platform_set_drvdata(pdev, lp87565);
185
186	config.dev = &pdev->dev;
187	config.dev->of_node = lp87565->dev->of_node;
188	config.driver_data = lp87565;
189	config.regmap = lp87565->regmap;
190
191	switch (lp87565->dev_type) {
192	case LP87565_DEVICE_TYPE_LP87565_Q1:
193		min_idx = LP87565_BUCK_10;
194		max_idx = LP87565_BUCK_23;
195		break;
196	case LP87565_DEVICE_TYPE_LP87561_Q1:
197		min_idx = LP87565_BUCK_3210;
198		max_idx = LP87565_BUCK_3210;
199		break;
200	default:
201		min_idx = LP87565_BUCK_0;
202		max_idx = LP87565_BUCK_3;
203		break;
204	}
205
206	for (i = min_idx; i <= max_idx; i++) {
207		rdev = devm_regulator_register(&pdev->dev, &regulators[i].desc,
208					       &config);
209		if (IS_ERR(rdev)) {
210			dev_err(lp87565->dev, "failed to register %s regulator\n",
211				pdev->name);
212			return PTR_ERR(rdev);
213		}
214	}
215
216	return 0;
217}
218
219static const struct platform_device_id lp87565_regulator_id_table[] = {
220	{ "lp87565-regulator", },
221	{ "lp87565-q1-regulator", },
222	{ /* sentinel */ }
223};
224MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table);
225
226static struct platform_driver lp87565_regulator_driver = {
227	.driver = {
228		.name = "lp87565-pmic",
229	},
230	.probe = lp87565_regulator_probe,
231	.id_table = lp87565_regulator_id_table,
232};
233module_platform_driver(lp87565_regulator_driver);
234
235MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
236MODULE_DESCRIPTION("LP87565 voltage regulator driver");
237MODULE_LICENSE("GPL v2");
238